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@uitrit giedre getest @frn WLLLIA'M D. GEIMSHAW, or NEWARK, NEW JERSEY.Letters lPatent No. 68,362, dated'iS'eptcmber 3, 1867 gimztcdutedugust18, 1.867,-

mrnovrn DEILLING MACHINE.

'To ALL WHoM Ir MAY CONCERN:

Be it known that I, -WILLIAM D. GRIMSHAW, oi. the city of Newazk, in thecountyof Essex, and State of New Jersey, have invented, made, andapplied to use, a certain new and useful improvement inDrill'ingMachines and I do hereby declare the following to'be a full, clear, andexact description of the said invention, reference being had to theannexed drawing, makingvpart of this specification,wherein- Figure 1 isa` side-elevation of the drilling machine complete.

Figure 2 is a. planet' the saine. I

Figurc-3 is an elevation ofthe bed-plate and drilllhclder; and

Figure 4 is a" detached plan of the bed-plate .and holding-slide...

Similar marks of reference denote the same parts.

My imprdve'd drill is' so arranged that it may be worked by the foot orby' a'blt, and the drill is kept up by a lever and weight or spring, soas to be out of the way while the article to be drilled is beingadjusted upon thevbed; but said lever also is employed by the attendantfor vforcing the drill to its Vwork'. I mount the bed for receiving thearticle to be drilled upon an adjustable slide that is clamped to avertical standard at any desired height, and the bled can bcfsliddennearer to or funken-trom `the said standard,.aseeeeaeionrrequireg in.presenting vthe article to be drilled to thenction of the tool, or saidslide can receive u. vise for holding any article, ort-he slide can beturned aside and the bed'or vise be used forany ordinary purposes.. l

Inthe drawing-'a is a vthi'ec-cornered- Vfoot to the standard l). c isa.' hollow' carrying vthe driving-shaft, at o'ne end-ef which is atruncated conc of pulleys, (1, which also actsV as a ily-wheel. Thesepulleys are-to be driven by a belt to'the pulleys c e, or by thecrank-handle f, er by'the foot ofthe workman applied to the treadle g,that passes through a mortise in the lower part ofthe standard, and hasits fulcrum at 1, and is ccnnccted by the link h to the crank-pin 2 atthe end of the said driring-slmlfft. v`1,' is the drill orA boringinstrument mounted in the drill-stock or shaft lc that is set to revolveund to slide vertically in the bearings l l that extend as arms from thestandard b. The drill-stock k has a groove around its upper end, takingthe point of u. screw,

. 3, in the head m, that is jointed to the lever ln, working through-ajaw, p, at the -top of the standard b, the fulcrum-pin 4 of which ischangeable, so as to give greater or less leverage for the' actionof thespringe in raising the drill-stock and'parts connected thereto. Thedrilllstock is rotated by a band, q, passing from the pulleys cl overthe guide-pulleys 7*, to the truncated cone of pulleys s on the stock7c. The guide-pulleys' r are upon arms extending from thestandard b. tis a slide formed oftwo parts clamped hyscrews 5 5 andr 6 to thestandard b at any desired height, and uis the bed for supporting thearticle to be bored- T his'bed d has on its under side dove-tail ribs,taking the similarly formed upper edges of the slides t, so that it canhe slidden nearer to'or further from the standard 6,' and hcncg, whenany article is secured to said bed, any required number of holescanhcbored in it, allparallcl to each other, without det-achingitofi'omsaid bed, within a space to which the capacity ofthe machine maybc. adapted, because the bed nndslides can be turned around horizontallyupon the standard b, or the bed be slidden nearer to or Nfurther fromsaid standard. .If desired, the slides can bc turncdnside from below thedrill and the bed-u bc used for ordinary work, orv a. vise withdove-tail lugs fitting the slides t may bc slipped on when the bed u isremoved.

What I claim, and desire .to secure by Letters Patent, i s Y 1, Theslides t, clamped to the standard 6,'and receiving the bed n,constructed and arranged in the manner and for the purposes specified. y

2.' I 'claim the pulleys d, r, und arranged .as set forth, in`combination with `the 'drill-stock 7c, treadle g,' and crank 2, :isandfor the purposes specicd. 4 I

In witness whereof I have hereunto sot my signuture this iirst clay ofNcvepibe, 13.1866.

' WILLIAM D." GEIMSHAW.

Gro. 5D.. Wennen,

